What gets me: These cars are upgraded and updated anytime through (overnight) software downloads from the company—just like a word processor.

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Tesla Motors introduced “Autopilot,” which makes recent Model S sedans and all Model X SUVs semi-autonomous, through an over the air software update on October 14. The system, installed in tens of thousands of vehicles, uses radar, cameras, GPS, and ultrasonic sensors to keep the car within its lane, maintain a safe following distance, and change lanes at the command of the human. CEO Elon Musk urged prudence when using Autopilot, saying, “We tell drivers to keep their hands on the wheel just in case, to exercise caution in the beginning.”